DESCR 569 B

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  1. This is a port of btoa version 5.2, written by Paul Rutter, Joe
  2. Orost & Stefan Parmark. btoa converts 4 binary characters to 5
  3. ascii ones, causing a 25% expansion. (btoa is thus more efficient
  4. than uuencode, which causes a 33% expansion.) Spaces will not be
  5. used, which should make it safe to send files over e-mail or Usenet
  6. without risking that blanks become tabs. Each resulting row of
  7. text has a single-byte checksum for error detection. A diagnosis
  8. file provides a list of errors found this way, which could then be
  9. used to retransmit only the failing lines.